The ESTRO-QUALity assurance network (EQUAL).
作者： André Bridier , Jean Chavaudra , Hans Svensson , Ivaldo H Ferreira , Andrée Dutreix
DOI: 10.1016/S0167-8140(99)00101-2
关键词:
摘要: Background and purpose: ESTRO has set up a Quality Assurance network (EQUAL) to check the dose delivered on axis in reference non-reference conditions for external radiotherapy. The audits covered by are based measurements made with mailed thermoluminescent dosimeters (TLD). Material methods: TLD consist of LiF powder type DTL 937 read PCL 3 automatic reader. participating centres instructed deliver TLDs absorbed doses 2 Gy calculated Treatment Planning System used clinical routine. A maximum three photon energies centre have been checked 10 on-axis points per beam. quantities include beam output, output variation collimator opening, depth data wedge transmission factor. Results: During 1998 EQUAL programme 102 corresponding 235 beams (28 60 Co 207 X-ray beams). About 3% outputs show deviations outside tolerance level (.^5%). similar rate deviation is noted percentage doses. (6%) observed (open wedged beams) analysis results shows that 24 out centres, at least one point, mainly large rectangular field sizes beams. Conclusions: importance quality assurance Radiotherapy especially non even if they only located (In order participate this network, please contact secretariat or download attached application form web site: Dr I.H. Ferreira Mrs Aline Mechet, EQUAL-ESTRO, Physics
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